Hi there and welcome
The wall socket Ethernet adapter, this is one that runs via your powerlines?
These will be the most likely cause for the issue, are you able to as a test, bypass these and run the router direct to the timecapsule to rule out these as the cause?
No, it has to be via the wired connection to act as a wireless point.
No sorry, as you need to see if it drops out so we need to test it this way
Thats ok, but move your computer closer to if ig you can.
The adapters can be the issue, or interference on your electrical network can also cause problems, that's why we rule this out first
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It means the devices are faulty or you have interference on your power grid.
I would first have the devices replaced and see if this corrects it.
If not, there is interference on your power cables at the location. You can start by unplugging all electrical devices except of course the computer and related devices, then see if this resolves it.
If not you may need an electrician to come in and see what the issue is with the power there.
If you would like any additional information or assistance, please do not hesitate to let me know.
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